1 files changed, 45 insertions, 0 deletions
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
new file mode 100644
index 000000000..7df5ba021
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
@@ -0,0 +1,45 @@
+package jogamp.opengl.util.pngj.chunks;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+
+/**
+ * PNG chunk type (abstract) that does not allow multiple instances in same
+ * image.
+ */
+public abstract class PngChunkSingle extends PngChunk {
+
+	protected PngChunkSingle(String id, ImageInfo imgInfo) {
+		super(id, imgInfo);
+	}
+
+	@Override
+	public final boolean allowsMultiple() {
+		return false;
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + ((id == null) ? 0 : id.hashCode());
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		PngChunkSingle other = (PngChunkSingle) obj;
+		if (id == null) {
+			if (other.id != null)
+				return false;
+		} else if (!id.equals(other.id))
+			return false;
+		return true;
+	}
+
+}